Enough Light For 60 Gallon Tank? Help

So currently working on my first Planted Tank, so far everything looks alright but I have a feeling maybe I'm not getting enough light to the bottom of the tank. Its lightly planted right now but by the end of the week, it will be heavily planted.

60 Gallon Tank, (48" Wide, 12" Deep, 24" High)

I have 2 x 18" 15W T8 Daylight (6500k) Bulbs running for 8-9 Hours a day.
The hoods they are in, read 120VAC, 60Hz, 17 W. These are the hoods that came with the tank, and then the lights sit directly on top of the glass covers.

Do you guys think that's enough, if not should I increase the hours, or remove the glass lids or should I invest in LEDS, if I should invest, what are your opinions on this bar, I would buy the 46"-54" Bar. I would remove the hoods, and just have it go the length of the tank, but can I keep the glass lids or should I have them removed as well?

This is the website I use to check if my lighting is effective. I will have to leave the question of if you current setup is the best setup for someone with more experience. It would be in the best interest to post the plants you plan to have to help people choose the most efficient lighting for you as some plants are low, medium, and high light needs.

While I haven't done much with planted tanks in a while I can tell you that 5 PAR isn't much at all. I'm not familiar with that calculator, but if it's accurate, then I'd imagine you'd struggle keeping anything other than things like Anubias, Java Moss, Anacharis, and maybe some hornwort. And with 0.5 watts per gallon, you're pretty low on that spectrum too (the watts/gallon rule is outdated, and isn't accurate, but is still a good guideline when talking about older T8 fixtures IMO).

I might suggest that you upgrade to a T5HO fixture (or two) for this tank, and I'd imagine that'd give you much better lighting and allow for most plants. Someone with more recent experience with large planted tanks should definitely speak up and give some more specific information, but with what you have now, i wouldn't expect too much.